Gyratory crusher



I fill/WIN F. H. EDWA GYRATORY CR APPLICATION men DEC.3I, m

1 ,410,244:. I Patented Mar. 21, 1922.

W h v IN VEA/ T 0/? A TTORNEXS UNITED STATES PATENT OFFICE.

FREDERICK H. EDWARDS, OF HER-EDEN, CQNNEGTICUT, ASSIGNOR TO AMERICAN MANGANESE STEEL COMPANY, OF AUGUSTA, MAINE, A. CORPORATION OF MAINE.

GYPVATORY GBUSHER.

Specification of Letters Patent.

'Application filed December 31, 1920. Serial No. 434,213.

To all whom it may concern:

Be it known that I, Fnnonnron H. En- W'ARDS, a citizen of the United States, and a resident of Meriden, in the county of New Haven and State of Connecticut, have made and invented certain new and useful Improvements in Gyratory Crushers, of which the following is a specification.

My invention relates to gyratory crushers, and more particularly to the crusher head. I l

The severe service to which the crusher head is necessarily exposed has heretofore caused the mantle to peen or stretch and accordingly; become loose upon the core, which results in a further stretching or peening of the same and in some instances has allowed the mantle to turn with relation to the core and thus loosen the holding bolts or nuts by means of which the mantle is held. in place. Further, the loosening of the mantlehas allowed the jars and impacts to be transmitted to the locking rings and nuts and thus has, in time, mutilated and destroyed the threads upon the crusher shaft, rendering necessary the replacement of the entire crusher shaft.

It is-accordingly an object of my invention to provide a crusher head which is so designed and arranged that the wearing mantle will always remain tight upon the core even though it peen and stretch in service and, remaining tight upon the core, will preventany jars 0r impacts from being transmitted to or brought to bear upon the threaded portion of the. crusher shaft.

A further object is to take advantage of thetendency of the wearing mantle to rotate with respect to the core by causing this tendency to rotation to force the mantle wedgedly against the core, thus holding the mantlefirmly in place and preventing any hammering between the mantle and core, or between the mantle and the locking ring and nut. i i

A further object is to provide a locking ring which may be formed of manganese steel, which will abut against, and the surface of which will form a continuation of the surface of, the wearing mantle, and in connection with the locking ring to'provide a lock nut which will not only hold the looking ring against rotation or movementbut will also center it with respect to the shaft and hold it out of contact with the latter, the locking ring tending to protect the extreinity of the wearing mantle and also the lock nut against injury'during the operation c't'the crusher.-

A further object is to attain-the1 aforementionedends'in a simple and expeditious manner; the crusherhead being so designed and arranged that, with the mantle once properly seated upon the core, it will always remain so fixed regardless of any stretching or peening which it may experience in service, and also. so con'stitutedthat the mantle will remain tightly secured in place regardless of the direction of f rotation of the crusher shaft, thus doing away -with the present arrangement .whereinit is necessary to provide a construction which is adapted to operate under a given condition as to the direction of rotation of the crusher shaft, and wherein serious losses have occurred when a crusher head which wa'sintended to operate in a mill which rotated in a clock-- wise direction was, through'error and mistake, placed in a mill which; operated in a counter-clockwise direction. '1

,Vith the foregoing and other objects in view, my invention consists in the, improved crusher head illustrated in the accompanyin g drawing and described in the following specification, and in the combination and arrangementof parts and in the details of construction as hereinafter described and claimed, it being understood that changes may be made within the scope of the claims without departing from the spirit of theinvention. y I

The preferred embodiment of my inven tion is disclosed in the accompanying drawing, wherein:

Figure 1 is view in elevation of my improved crusher head; and

Figure 2 is a somewhat enlarged View in vertical longitudinal section of the same and illustrating the structural details thereof,

Referring specifically to the several views wherein similarreference numerals designate corresponding parts throughout, the crusher shaft 10 is provided with the usual threaded portion 11 and core 12. The core is permanently secured to or formed as a part ofthe shaft Hand is provided with the external conical surface 13, the core and shaft as thus formed being of standard con struction as in commercial use at the present time.

A,wearing mantle 14, preferably formed of manganese or other wear-resisting steel, is provided with the inner conical surface 15 which is adapted to seat against and contact with the conical surface 13 of the core. In

faces l9-20 of a locking ring 21. I do not wish to limit myself as to the number of inclined faces with which the locking ring and wearing mantle may beprovided, as it will be readily appreciated that the number may be increased without departing from the spirit of my invention".

. The locking ring 2118' also preferably formed of hard wear-resisting metal, such as manganese steel, and is provided with the groove or annular recess 22, into which extends the ledge or shoulder 23' of a lock nut 24. The lock nut 24 threadedly engages the shaft 10 and is provided with holes (not shown) for engagement by a spanner wrench, or is provided with other simllar artifice whereby the lock nut may be tightly screwed into place. i A key 25 is adaptedto engage the shaft 10 and lock nut 24 and positively lock the two against relative rotation. In order that the locking the lock nut (which of the locking ring may be positively fixed to the lock nut, I

have provided the confronting surfaces of the lock nut and locking ring with the semi-cylindrical recesses 26. A pin 27 is adapted tobe forcibly driven into a pair' offaligned recesses and thus positively lock thenut and ring against relative rotation.

With the parts as thus constructed the absence of threads 'onthelocking ring 21 allows it, as previously mentioned, to be formed of manganese steel and the surface ring, extending flush with the surface of the wearingmantle, prevents the localinjury or abrasion of the latter and provldes thatthe coacting surfaces of the locking ring and mantle will always properly function to exert an end pressure on the wearing mantle.- Further, the lock nut is sharplybevelled away from the surface ofth'e locking ring so as to prevent must necessarily be formed ofa material other than manganese steel, iiwhlch flatter cannot be successfully threaded) from becoming injured or darn aged in service, or in any way loosened as it does not come in contact with the material which is being crushed.

WVith the parts as thus arranged and with the lock nut firmly pressing againstthe looking ring and mantle, and with the key 25 and pin 27 iirmly held in place, the mantle is rigidlyjand permanently held upon the core. Further, the ratchet-like faces of the locking ring andwearing mantle take ad vantage of the tendency of the mantle to rotate as soon as it loosens from the core, this tendency to rotation immediately causing the ratchet faces of the ring and mantle to thrust the mantle endwise of-the core and wedgedly hold it in proper seated position. The mantle and lockingring, being provided with oppositely inclined faces, provides that this seating action will take place regardless of the directionof rotation of the crusher shaft.

Having thus fully described and explained my invention,'I claim and desire to secure by Letters Patent:

1. A crusher head comprising a'threaded shaft having. a rearwardly enlarged core thereon, a manganese steel wearing mantle ting against the smaller extremity of said seating upon said core, alocking ring abutmantle, the abutting or confronting sur faces of said locking ring and mantle formed'to produce a rearward end pressure upon said mantle upon the relative turning of said locking'ring and mantle, the said locking ring being formed of hard wear resisting metal and characterized by a smooth or unthreaded bore extendingtherethrough,

va lock nut engaging saidlocking ring and hol'ding the external surface of'the latter flush with and forming a continuation of the external surface of said mantleya key engaging the locking'ring and lock nut preventing -the relative rotation thereof, and a second key engaging the shaft and the locking nut and tation thereof.

2. A crusher head comprising a threaded shaft having a rearwardly enlarged core thereon, a manganese steel wearing mantle seating upon said core, a manganese steel preventing the relative rolocking ring abutting against the smaller extremity of said mantle, th'eabutting or confronting surfaces of said locking ring and mantle formed to produce a rearward end pressure upon said mantle upon the relative turning of said lockingring and mantle, said locking ringprovided'witha smooth bore extending therethrough and partially formed-as an annular recess, a lock nut provided with aflprotruding shoulder fitting within the annular recess and adapted to support the locking ring with the external surface thereof flushed with and'formi'nga continuation of external surface of said mantle, said 1001: nut sharply hattan, in the county of New York and bevelled away from the said locking ring, State of New York, this 20th day of Deeem- 10 a key engaging the locking ring and lock her, A. D. 1920.

nut preventing the relative rotation thereof e I and a second key engaging the shaft and the FREDERICK EDVARDS' look nut and preventing the relative rota- Witnesses:

tion thereof. E. L. PEMBERTON,

Signed at New York, borough of Man- LAURA E. SMITH. 

